Splicing in a new Sigma Pro earspeaker into another pair of Sigma Pros. Now

that I have determined that my SRM007ta amplifier is working properly- thanks to Spritzer and my new multimeter, I am now left with some working left side Sigma Pros. The right side Sigma Pros died- possibly as a result of old age- not the fault of the amp. Is it possible to splice or connect two Left Earspeakers together creating another pair of Sigma Pros. If so, how? Etc, Etc, Etc. I just want to salvage the remaining pieces if I can.

I have tried to do this proceedure twice; each time being careful to match up the solid line running down the side of the earspeaker cable. Solid to Solid; Additionally, I stripped about an inch off of the ends of the cables and match up each of the three wires so that-- left to left- center to center and right to right. After they were all taped up and secured, I then plugged the new heaphones into my SRM007t and still found that only one of the earspeakers was working; that being the left earspeaker.